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(No Model.) 2 Shets-Sheet 1.

D. DONGASTER.

SANDPAPERING MACHINE.

No. 355,066. Patented De0.28, 1886.

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D. D'ONGASTBR. SANDPAPERIHNG MAGHINE.

No. 355,066. Patented Dec. 28, 1886.

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UNITED STATES ATENT tries.

DANIEL DONCASTER, OF MECHANICSVILLE, NEl/V YORK.

SANDPAPERlNG-VIACHINE.

SPECIFICATION forming part of Letters Patent No.355,066, dated December 28, 1886.

Application filed November 13, 1885. Serial No. 183,716. (No model.)

To add whom, it may concern.-

Be it known that I, DANIEL DONOASTER, of Mechanics'viile, in the county of Saratoga and State of New York, have invented anew and Improved Sand papering-lllachine, ofwhich the following isa full, clear, and exact description. The object of my invention is to provide a new and improved machine for sandpapering doors, sashes, and other like articles ofjoiner work rapidly and perfectly'at a small expense and in a short time.

The invention consists in the construction and combination of parts and details, as will be fully described and set forth hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate cor responding parts in all the figures.

Figure 1 is a plan view of my improved sandpapering-niachine. Fig. 2 is a side view of Fig. 3 is an enlarged detail sectional view of the head in which the shaft carrying the sand-paper holder revolves. Fig. 4 is a sectional plan view of the same on the line 00 m, Fig. 3. Fig. 5 is an enlarged crosssectional view on the line y y, Fig. 2..

The U shaped head A is provided at one end with the handle B and on the other end with the cross-piece O, and in the said head the tube D is journaled, on which the belt-pulley E is rigidly mounted within the head. On the lower end of the tube D the flat circular head F is secured, which has its bottom open, and within the head a pressing disk or plate, G, is mounted to turn on the lower end of a rod,H, passed longitudinally through the tube D,and having its upper end secured in the screwthreaded stem J of the hand-wheel K, the said stem being screwed in the upper end of the tube D.

The end piece, 0, is provided with the longitudinal slot L, into which the lug M of the cross-piece N on the end of the shaft 0 is passed, and is then pivoted by means of the pin P. Screws Q, held in the cross-piece N, rest against the end piece, 0, and serve to adjust the cross-piece N in relation to the end piece, 0. The end of the shaft 0 is passed intov the socket R, formed on the U-shaped frame S, mounted to turn on the shaft T,which is journaled on the ends of the two united shafts U, the opposite ends of which are mounted to turn on the shaft V,which is journaled in the bracket XV, fixedto a suitable support.

On the shaft T the belt-pulleys (L and b are mounted, and on the shaft V the belt-pulley d is mounted. A belt, w, passes over the pulleys' E and b, and a belt, 15. passes over the pulleys a and d. The shaft 0 is provided with the short circumferential groove 9, into which a pin,-h, passes, which is also passed through a slot, is, in the socket R, and is secured on the curved spring-strip m,'having its other end secured on the socket R, and is provided with handle-button 0 on its free end. The frame formed of the shaft .0 and the shafts U' is adapted to swing in a horizontal plane and over a door or other article placed on a suitable horizontal support and below the head F.

' The operation is as follows: Theh-and-wheel K is turned in such a manner as to move the disk G from the bottom of the head F, and a number of sheets of sand-paper are placed in the lower part of the said head F with the sanded sides downward, and then the handi wheel K is turned in such amanner as to press the sheets down into" the lower part of the head F, where they are held securely. Then the sanded face of the lowest sheet has been worn off, the said sheet is torn off, and, if necessary, the disk G is screwed down to prevent loosening of the remaining sheets. The head F is revolved bythe several belts and pulleys, and the sanded surface of the lowest sheet is brought in cont-act with the surface tobe sandpapered. The head can easily be brought over any desired part of the said surface. The shaft 0 can be turned slightly on its longitudinal axis as the pin it passes into the groove 9, and thus the head A can be turned slightly in tthe direction transversely to the longitudinal axis of the said head A. As the lug M is pivoted in the slot L in the end piece, 0, the head 9 5 A can be slightly turned in the direction of the length of the said head A. The tube D can be adjusted to project a greater or less distance from the bottom of the head A. This is accomplished by adjusting the two collars 10o on said tube at opposite sides of the pulley E by means of the set-screws, that pass through the collars and bear against the tube D. The sheets of sand-paper may be circular or square.

The above-described head has a universal movement by reason of the construction of parts before described, and accommodates itself when in operation to the wind or twist in doors or the spring in panels, or to an uneven bench, or a bench that is not horizontal or level.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is t 1. The combination, with a revoluble bottomless head having a flange around the inner side of its lower edge, of a vertically-adjustable disk within the head, and constructed to form, in connection with the said flange, a clamp, substantially as set forth.

2. The combination, with a U-shaped frame or head, A, of the tube D, journaled in the same, a head for receiving sand-paper on the lower end of the tube, a clamping-disk in the said head, a rod passed through the said tube and connected with the disk, and of a screwwheel in the upper end of the tube, with which screw-wheel the rod passed through the tube is connected,substantial1y as herein shown and described.

3. The combination, with the U- shaped head or frame A, having the slot L in its end piece, 0, of a revolving tube .or shaft in the said frame or head A, a sandpaper-holding head on the lower end of said shaft or tube, the lug M, projecting from the cross-piece N and pivoted in the slot L, and of the shaft 0, on

in the end piece, (3, of the frame A and pivoted in said slot, the adj usting-screws Q in the ends of the cross-piece N, and of shafting from which the shaft 0 is supported, substantially as herein shown and described.

5. The combination, with the head or frame A, ofa revolving sandpaper-holding head on the said frame or head A, of the shaft 0, on the end of which the frame or head A is held, and which shaft is provided at its opposite end with the slot or groove 9, the socket R on the frame S, into which socket the end of the shaft 0 is passed, the spring-strip m on the socket R, and the pin h on the end of the springstrip, which pin is passed into the groove g in the shaft 0, substantially as herein shown and described.

DANIEL DONCASTER.

'Witnesses:

CHARLES O. GREENE, BENJAMIN B. SMITH. 

